Adam Sandler donated copies of this movie to U.S. military bases supporting Operating Enduring/Iraqi Freedom in the Persian Gulf as soon as it was released. The donated version contains a 5-minute introduction by Adam Sandler, who personally thanks the troops for what they are doing.
Buddy picks up a golf club and a baseball bat before choosing the baseball bat to smash the window of the Lexus. In 1994, Jack Nicholson was cited for smashing a man's window with a golf club in a bout of rage.
The then New York mayor, Rudolph W. Giuliani, appears as a baseball fan who yells to Adam Sandler's character - "You can do it!". This line famously features in many of Adam Sandler's films, where it is usually shouted by frequent Sandler collaborator Rob Schneider.
In the scene where Adam Sandler is kissing Marisa Tomei in Yankee Stadium, if you look behind them to the right, an extra is wearing a Boston Red Sox cap. The Red Sox are arguably one of the Yankee's biggest rivals.
At the same time this movie was shooting the hospital scene on the ramps at Columbia University, Comedy Central was filming Porn 'n Chicken (2002) right outside. In fact, the graduation set for Porn 'n Chicken is in the distance outside the glass wall. Kurt Fuller appears in both films.
Adam Sandler's character Dave wears a West High School T-Shirt, West High School is a school in Manchester, New Hampshire. West is the arch-rival to Central High School in Manchester, New Hampshire which Adam Sandler attended.